title: First sexual intercourse: age, coercion, and later regrets reported by a birth cohort.
abstract: OBJECTIVE
  To investigate how age at first sexual intercourse is related to the reported circumstances and to determine how these corresponded to views in early adulthood about its timing.
  
  
  METHODS
  Cross sectional study within a birth cohort using a questionnaire presented by computer.
  
  
  METHODS
  Dunedin, New Zealand in 1993-4.
  
  
  METHODS
  477 men and 458 women enrolled in the Dunedin Multidisciplinary Health and Development Study, comprising 92% of survivors of the cohort.
  
  
  RESULTS
  The median age at first intercourse was 17 years for men and 16 years for women. Only one man (0.2%) but 30 (7%) women reported being forced to have intercourse on the first occasion. For women, there were increasing rates of coercion with younger age at first intercourse. More men than women reported that they and their partner were equally willing (77% (316/413) v 53% (222/419)). Mutual willingness of both partners was greater for those who reported that it was also the first time for their partner. Timing of first intercourse was considered about right by 49% (200/411) of men and 38% (148/388) of women. Many women (54% (211/388) reported that they should have waited longer, and this rose to 70% (90/129) for women reporting intercourse before age 16.
  
  
  CONCLUSIONS
  Most women regretted having sexual intercourse before age 16. First intercourse at younger ages is associated with risks that are shared unequally between men and women. This information is important to young people themselves.
authors.affiliation: Department of Preventive and Social Medicine, University of Otago Medical School, Dunedin, New Zealand.
authors.forename: N
authors.initials: N
authors.lastname: Dickson
authors.forename: C
authors.initials: C
authors.lastname: Paul
authors.forename: P
authors.initials: P
authors.lastname: Herbison
authors.forename: P
authors.initials: P
authors.lastname: Silva
mesh_terms: D000328:Adult; D000367:Age Factors; D001294:Attitude to Health; D003068:Coercion; D015331:Cohort Studies; D003075:Coitus / Q000523:psychology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D009520:New Zealand; D012737:Sex Factors